The beginning of spring and the beginning of autumn are considered to be important junctions of climatic and solar influences. These two periods are taken as sacred opportunities for the worship of the Divine Mother Durga. The dates of the festival are determined according to the lunar calendar. on which each women follow tradition to wear nine colours of dress on Navaratri.

Navaratri represents a celebration of the Goddess Amba, (the Power).

Navaratri or Navadurga Parva happens to be the most auspicious and unique period of devotional sadhanas and worship of Shakti (the sublime, ultimate, absolute creative energy) of the Divine conceptualized as the Mother Goddess-Durga, whose worship dates back to prehistoric times before the dawn of the Vedic age.

A whole chapter in the tenth mandal of the Rigveda addresses the devotional sadhanas of Shakti. The "Devi Sukta" and "Isha Sukta" of the Rigveda and "Ratri Sukta" of the Samveda similarly sing paeans of praise of sadhanas of Shakti. In fact, before the beginning of the legendary war between the Pandavas and Kauravas in the Mahabharata – a foundational Sanskrit epic in the Hindu tradition – Lord Krishna worshipped Durga, the Goddess of Shakti, for the victory of the Pandvas.

Lord Brahma is cited in the Markandey Purana as mentioning to Rishi Markandey that the first incarnation of Shakti was as Shailputri. Further incarnations of the Divine Mother are: Brahmcharñi, Chandraghanta, Kushmanda, Skandamata, Katyayani, Kalratri, Mahagauri and Siddhidatri in that order. These nine manifestations of Shakti, are worshipped as "Nava-Durga". The fifth chapter of the Rudra Sanhita of Shiva Purana also vividly describes the various Divine Emanations of Durga.

Since the Vedic Age of the Rishies, the devotional practices recommended during Navaratri are primarily those of Gayatri Anushthana.

In the Vedic Age of the Indian Culture, the religious philosophy and devotional practices were focused towards true knowledge and ultimate realization of the supreme power of Gayatri (Bram Shakti). The Vedas were the basis of all streams of spirituality and science those days. Gayatri has been the source of the divine powers of the gods and non-goddesses in the heavens and their angelic manifestations and incarnations. Gayatri sadhana was also paramount in the higher level spiritual endeavors of the yogis and tapaswis. Gayatri Mantra was the core-focus of daily practice of sandhya-vandan (meditation and devotional worship) for everyone. As guided by the rishis, specific sadhanas and upasanas of the Gayatri Mantra were sincerely practiced during the festival period of Navaratri by every aspirant of spiritual enlightenment.

Navaratri is celebrated Four times a year. They are Vasanta Navaratri, Ashadha Navaratri, the Sharad Navaratri, and the Paush/Magha Navaratri. Of these, the Sharad Navaratri of the month of Puratashi and the Vasanta Navaratri of the Vasanta kala are the most important.Other two are observed only by shaktas only

Vasanta Navaratri: Vasanta Navaratri, is nine days dedicated to the nine forms of Shakti (Mother Goddess) in the month of Chaitra (March–April) and is observed during the Shukla Paksha (waxing phase of moon) of Chaitra. The beginning of this Navaratri also marks the start of the new year as per the Hindu mythological lunar calendar (Vikrami Samvat).

Ashad Navaratri : Gupta Navaratri, also referred as Ashadha or Gayatri or Shakambhari Navaratri, is nine days dedicated to the nine forms of Shakti (Mother Goddess) in the month of Ashadha (June–July). Gupta Navaratri is observed during the Ashadha Shukla Paksha (waxing phase of moon).this is mostly observed by shaktas only

Sharad Navaratri: This is the most important of the Navaratris. It is simply called Maha Navaratri (the Great Navaratri) and is celebrated in the 'pratipada' (first day) of the bright fortnight of the lunar month of Ashvin. Also known as Sharad Navaratri, as it is celebrated during Sharad (beginning of winter, September–October).

Pausha/Magha Navaratri: Pausha Navaratri, also referred as Shakambari Navaratri, is eight days dedicated to the nine forms of Shakti (Mother Goddess) in the month of (December–January). Paush Navaratri is observed during the Pausha Shukla Paksha (waxing phase of moon). Shakambhari Purnima is the last day in the 8-day long holiday of Shakambari Navaratri. Most Navaratri begins on Shukla Pratipada except for Shakambari Navaratri, which begins on Ashtami and ends on Purnima in Paush month.[3]

In days long gone by, King Dooshibago was killed by a lion when he went out hunting. Preparations were made to crown the prince Sudarsana. But, King Yudhajit of Ujjain, the father of Queen Lilavati, and King Virasena of Kalinga, the father of Queen Manorama, were each desirous of securing the Kosala throne for their respective grandsons. They fought with each other. King Virasena was killed in the battle. Manorama fled to the forest with Prince Sudarsana and a eunuch. They took refuge in the hermitage of Rishi Bharadwaja.

The victor, King Yudhajit, thereupon crowned his grandson, Satrujit, at Ayodhya, the capital of Kosala. He then went out in search of Manorama and her son. The Rishi said that he would not give up those who had sought protection under him. Yudhajit became furious. He wanted to attack the Rishi. But, his minister told him about the truth of the Rishi’s statement. Yudhajit returned to his capital.

Fortune smiled on Prince Sudarsana. A hermit’s son came one day and called the eunuch by his Sanskrit name Kleeba. The prince caught the first syllable Kli and began to pronounce it as Kleem. This syllable happened to be a powerful, sacred Mantra. It is the Bija Akshara (root syllable) of the Divine Mother. The Prince obtained peace of mind and the Grace of the Divine Mother by the repeated utterance of this syllable. Devi appeared to him, blessed him and granted him divine weapons and an inexhaustible quiver.

The emissaries of the king of Benares passed through the Ashram of the Rishi and, when they saw the noble prince Sudarsana, they recommended him to Princess Sashikala, the daughter of the king of Benares.

The ceremony at which the princess was to choose her spouse was arranged. Sashikala at once chose Sudarsana. They were duly wedded. King Yudhajit, who had been present at the function, began to fight with the king of Benares. Devis helped Sudarsana and his father-in-law. Yudhajit mocked Her, upon which Devi promptly reduced Yudhajit and his army to ashes.

Thus Sudarsana, with his wife and his father-in-law, praised Devi. She was highly pleased and ordered them to worship her with havan and other means during the Vasanta Navarathri. Then she disappeared.

Prince Sudarsana and Sashikala returned to the Ashram of Rishi Bharadwaja. The great Rishi blessed them and crowned Sudarsana as the king of Kosala. Sudarsana and Sashikala and the king of Benares implicitly carried out the commands of the Divine Mother and performed worship in a splendid manner during the Vasanta Navarathri.

Sudarsana’s descendants Sri Rama and Lakshmana also performed worship of Devi during the Sharad Navarathri and were blessed with Her assistance in the recovery of Sita.

According to the Krittibas Ramayana, Rama invoked the goddess Durga in his epic battle against Ravana. Although Goddess Durga was traditionally worshipped in the late spring, due to contingencies of battle, Lord Rama had to invoke her in the form of astam (eighth) Mahavidya (Maa Bagla) in the autumn and thus is known as akaal bodhan (invoking out of scheduled time). This autumnal ritual was different from the conventional Durga Puja, which is usually celebrated in the springtime. So, this Puja is also known as 'akal-bodhan' or out-of-season ('akal') worship ('bodhan'). This Rama's date for the Navaratri puja has now gained ascendancy and culminates with Dusherra in North India on the following day.

The sharan navaratri commences on the first day (pratipada) of the bright fortnight of the lunar month of Ashvin. The festival is celebrated for nine nights once every year during the beginning of October, although as the dates of the festival are determined according to the lunar calendar, the festival may be held for a day more or a day less.

Navaratri is celebrated in different ways throughout India. In North India, all three Navaratris are celebrated with much fervor by fasting on all nine days and worshiping the Mother Goddess in her different forms. The Chaitra Navaratri culminates in Ram Navami and the Sharad Navaratri culminates in Durga Puja and Dussehra. The Dussehra of Kullu in Himachal Pradesh is particularly famous in the North. Navaratri festival in Gujarat is one of the main festivals. Garba is a dance which people perform on all nine nights, after the Durga Pooja, in groups accompanied by live orchestra or devotional songs.

The last four days of Sharad Navaratri take on a particularly dramatic form in the state of West Bengal in eastern India where they are celebrated as Durga Puja.[4] This is the biggest festival of the year in this state. Exquisitely crafted and decorated life-size clay idols of the Goddess Durga depicting her slaying the demon Mahishasura are set up in temples and other places. These idols are then worshiped for five days and immersed in the river on the fifth day.

In the Punjab, Navaratri is known as Navratras or Naratey where the first seven days are for fasting. On the eighth day or Ashtami, devotees break their fasts by calling young girls home and these girls are treated as the goddess herself. They are called "Kanjak Devis". People ceremonially wash their feet, worship them and then offer food to the "girl-goddesses" giving them the traditional puri, halwa and chana to eat along with bangles and the red chunnis (scarves) to wear with a token amount of money as "shagun". The ninth day is then called Navami which means literally the ninth day of this holy and pious period.[5]

Another prevalent practice is of sowing pulses, cereals and other seeds on the first day of this festival in a pot which is watered for nine days at the end of which the seeds sprout. This pot is worshipped throughout the nine days. This custom is also indicative of fertility worship and is known as "Khetri". The barley grains planted on the first day of Navaratras, in the puja room of the house, are submerged in water after saying prayers on Dussehra. The sowing and reaping of barley is symbolic of the "first fruit".[5]

In Western India, particularly in the state of Gujarat and Mumbai, Navaratri is celebrated with the famous Garba and Dandiya-Raas dance. Since the past few years, the Government of Gujarat has been organising the "Navaratri Festival Celebrations" on a regular basis for the nine days of Navaratri Festival in Gujarat. People from all over Gujarat and even abroad come to participate in the nine-day celebration. It is also popular throughout India and among Indian communities around the world including the UK, Canada, Malaysia, Singapore and USA.

In the temples of Goa,on the first day of the seventh month of the Hindu calendar Ashwin, in some temples, a copper pitcher is installed surrounded by clay in which nine varieties of food grains are sown inside the sanctum sanctorum of the temple. All the nine nights are celebrated by presenting devotional songs, and through religious discourses. Later in the night the idol of the goddess is put in a specially-decorated colourful swing and for nine nights, this swing is being swung to the tune of temple music (called as ranavadya) by devotees who throng in large numbers to participate in the festival.[6]

In Maharashtra, on the first day of month of Ashwin, Ghatasthapana is celebrated. An earthen pot is filled with water surrounded by clay in which foodgrains are sown and are allowed to sprout for nine days. Five stems of jowar are also placed over the pot. This arrangement is called the "Ghat". The ladies worship the pot for nine days by offering rituals and a garland of flowers, leaves, fruits, dry-fruits, etc. with a naivedya, and water is offered in order to get the seeds sprouted. Some families also celebrate Kaali pujan on days 1 and 2, Laxmi pujan on days 3, 4, 5 and Saraswati pujan on days 6, 7, 8, 9 along with Ghatasthapana. On the eighth day, a "Yajna" or "Hom" is performed in the name of Goddess Durga. On ninth day, the Ghat pujan is done and the Ghat is dissolved after taking off the sprouted leaves of the grains. In many families, a woman from Matang community is called and offered food and blessings are sought from her. She is considered as a form of the Goddess "Matangi". This process is called "पात्रं भरणे" in Marathi. On the occasion of Dasara or Vijayadashmi, the men go to the forest or farm and bring the leaves of the tree Apta. They worship iron in the form of utensils, weapons, etc. The iron equipments are washed and offered leaves of Apta called gold or "sona" and also leaves of the grains which were sprouted. On this day, a process called Vidyarambhan meaning beginning of learning takes place when small children are to write first alphabet.

In South India, people set up steps and place idols on them. This is known as golu. Photos of typical golu displayed in Tamil Nadu style can be found here.

In Karnataka, Ayudha Puja, the ninth day of Mysore Dasara, is celebrated with the worship of implements used in daily life such as computers, books, vehicles, or kitchen tools. The effort to see the divine in the tools and objects one uses in daily life is central to this celebration, so it includes all tools that help one earn one's livelihood. Knowledge workers go for books, pen or computers, farmers go for the plough and other agricultural tools, machinery for industrialists and cars/buses/trucks for the transportation workers—all are decorated with flowers and worshiped on this day invoking God's blessing for success in coming years. It is believed that any new venture such as starting of business or purchasing of new household items on this day is bound to bring success and prosperity.

Mysore is well known for the festivities that take place during the period of Dasara, the state festival of Karnataka. The Dasara festivities, which are celebrated over a ten-day period, it made official festival of the state by King Raja Wodeyar I in 1610.[7] On the ninth day of Dasara, called Mahanavami, the royal sword is worshipped and is taken on a procession of decorated elephants, camels and horses.[7] On the tenth day, called Vijayadashami, the traditional Dasara procession (locally known as Jumboo Savari) is held on the streets of Mysore. An image of the Goddess Chamundeshwari is placed on a golden howdah on the back of a decorated elephant and taken on a procession, accompanied by tableaux, dance groups, music bands, decorated elephants, horses and camels.[7] The procession starts from the Mysore Palace and culminates at a place called Bannimantapa, where the banni tree (Prosopis spicigera) is worshipped.[7] The Dasara festivities culminate on the night of Vijayadashami with a torchlight parade, known locally as Panjina Kavayatthu.[7]

In Kerala and in some parts of Karnataka three days: Ashtami, Navami, and Vijaya Dashami of Sharad Navarathri are celebrated as Sarasvati Puja in which books are worshiped. The books are placed for Puja on the Ashtami day in own houses, traditional nursery schools, or in temples. On Vijaya Dashami day, the books are ceremoniously taken out for reading and writing after worshiping Sarasvati. Vijaya Dashami day is considered auspicious for initiating the children into writing and reading, which is called Vidyarambham. Tens of thousands of children are initiated into the world of letters on this day in Kerala.

The final set of three days is spent in worshiping the goddess of wisdom, Saraswati. In order to have all-round success in life, believers seek the blessings of all three aspects of the divine femininity, hence the nine nights of worship.

Eighth day is traditionally Durgashtami which is big in Bengal and Bihar.

In some parts of South India, Saraswati puja is performed on the 9th day. Ayudha Puja is conducted in many parts of South India on the Mahanavami (Ninth) day with much fanfare. Weapons, agricultural implements, all kinds of tools, equipments, machinery and automobiles are decorated and worshipped on this day along with the worship of Goddess. The work starts afresh from the next day, i.e. the 10th day which is celebrated as 'Vijaya Dashami'. Many teachers/Schools in south India start teaching Kindergarten children from that day onwards.

In North India, as the culmination of the Ramlila which is enacted ceremoniously during Dussehra, the effigies of Ravana, Kumbhakarna, and Meghanada are burnt to celebrate the victory of good (Rama) over evil forces on the 'Vijaya Dashami' day.

During Navaratri, some devotees of Durga observe a fast and prayers are offered for the protection of health and prosperity. Devotees avoid meat, alcoholic drinks, grains, wheat and onion during this fast. Grains are usually avoided since it is believed that during the period of Navaratri and seasonal change, grains attract and absorb lots of negative energies[8] from the surrounding and therefore there is a need to avoid eating anything which are produced from grains for the purification of Navaratri to be successful. Navaratri is also a period of introspection and purification, and is traditionally an auspicious and religious time for starting new ventures.

During this vowed religious observance, a pot is installed (ghatasthapana) at a sanctified place at home. A lamp is kept lit in the pot for nine days. The pot symbolises the universe. The uninterrupted lit lamp is the medium through which we worship the effulgent Adishakti, i.e. Sree Durgadevi. During Navaratri, the principle of Sree Durgadevi is more active in the atmosphere.

Navaratri is celebrated in a large number of Indian communities. The mother goddess is said to appear in 9 forms, and each one is worshiped for a day. These nine forms signify various traits that the goddess influences us with. The Devi Mahatmya and other texts invoking the Goddess who vanquished demons are cited.

During the eight or ninth day, Kanya Puja, pre-pubescent girls are ceremonially worshipped.